Warp-stop-motion detector for looms



Patented June 6, I899.

G. O. ORAPER. WARP STOP MOTION DETECTOR FOR LOOMS (Application filedSept. 92, 1898.)

(No Model.)

THE uonms PEYERS 00,. Pnoruumm WASNINGTON. 04 c.

UNinn STATES PATENT FFICE.

GEORGE O. DRAPER, OF HOREDALE, MASSACHUSETTS, ASSIGNOR TO THE.

DRAPER COMPANY, OF SAME PLACE AND PORTLAND, MAINE.

WARP-STOP-MOTION DETECTOR FOR LOOMS...

SPECIFICATION forming part of Letters Patent No. 626,412, dated June 6,1899.

Application filed September 22, 1898. Serial No. 691,573. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE O. DRAPER, 0t Hopedale, county of Worcester,State of Massachusetts, have invented an Improvement inWVarp-Stop-llotion Detectors for Looms, &c., of which the followingdescription, in connection with the accompanying drawings, is aspecification, like letters and figures on the drawings representinglike parts.

VVarp-stop-motion mechanisms for looms and some other textile apparatusare frequently made to operate upon the abnormal positioning of adetector-a device or member which is controlled as to its position byone or more warp-threads--a series of such detectors being employed inaccordance with the number of warp-threads.

\Vhile the warp-threads are intact or maintained under proper tension,the detectors are held in inoperative position, a detector moving intoabnormal or operative position upon failure or slackening of itscontrolling Warp thread or threads, and the stop-motion mechanism thenacts to automatically stop the apparatus.

In looms for weaving the detectors may be arranged and located entirelyindependent of the shedding devices, or the detectors may be alsoutilized as heddles in the harness-frames, as in United States PatentNo. 536,969, dated April 2, 1895, the result of their cooperation withthe stop-motion mechanism effecting the the same result in eithercaseviz. automatic stoppage of the loom.

The detectors are conveniently and preferably made of thin flat sheetmetal stamped out or struck up into the desired shape and provided witha closed slot through which is extended a supporting-bar which sustainsa detector when in abnormal position and freed from the control of itswarp-thread, the slot being longer than the depth of the bar in order topermit a relative vertical movement of detector and bar. iVhether thisbar be a fixed support or forms a part of a harness-frame it is verydesirable that a detector may be applied to or removed from the barwithout disarrangement of the other detectors or removal of the bar, forit often happens that after a warp is drawn in an extra thread is foundon the beam, and this thread must be either crossed over to the end ofthe supporting-bar, where a new detector can be most readily applied, ora detector must be inserted in the proper place in some other manner.

My present invention has for its object the production of a noveldetector which may be applied to or removed from the supportingbar atany point with the greatest ease without any disarrangelnent of eitherthe bar or the other detectors of the series.

Figure 1 represents in longitudinal section a sufficient portion of aloom to be understood with one embodiment of my present inventionapplied. thereto,the detectors also serving as heddles in the apparatuschosen for illustration. Fig. 2 is an enlarged side elevation of adetector embodying my invention, and Fig. 3 is a similar view of amodified form of detector.

Referring to Fig. 1, the side bars a Z) of the harness-tram es arerigidly connected by transverse bars a a 1) b the frames beingreciprocated in usual man ner-as, for instance, by the mechanism shownin the patent referred toand provided with a flexible overheadconnection a*. Vibrating feelers ff cooperate with the detectors d(shown in Fig. 1 as mounted on the cross-bars of the harnessframes, aswill be described,) the devices between the feelers and the stop-motionmechanism and such latter mechanism not being shown herein, as they formno part of my invention.

The detector d is preferably stamped from thin sheet-steel in tape-likeform. It may be of the width desired for the detectors, the completeddetector having parallel longitudinal edges 3 3, Fig. 2, and usually awarpreceiving eye d.

My detector shown in Figs. 1 and 2 is adapted to be applied to eitherone or apair of supporting-bars, and in order to secure such adaptationthe detector is provided at or near each end with an open slot d,extending in the direction of the lengthbf the detector and having itsentrance d at one of the longitudinal edges thereof. The entrance d tothe slot is shown as located between the ends of the slot, and adjacenttheinner ends, forming an open supporting hook, the tongue d3: of whichlies within-theboundaries-of the de-a tector.

of thejentrance thereof, so that the bar will have a bearing whendepressing thedetector,

as when the harness-frame is in the lower part of the shed, and toprevent accidental disen j;

" gagement of the detector and its bar.

The entrance d -is made narrower than the depth of the-supporting-bar,as shown by dotted lines, Fig. 2, to prevent accidental displacement ofthe detector when inposition on theobar.

To-applya detector to'a single har, the former'i's ti'pped to slide thehook over the'bar,

andwhen the bar i's inthe 'slot the detector is moved back intoverticalposition, asshown inFig..11, removal 'of'the detector loeing ef-' fectedbya reversal ofthe movements above set forth. mlt-willthns be obviousthat a de- 1 tector'may'be -applied to a bar-at anypointwitho'ut'in'anyway disarrangi'ng or changing the position=of the baror'detaching it'from its supports. V

When a' detector is to be'applied to two b'ars,1a's tofaharness-frame"such as shown in Fig. 1,""the detectorisapplied to one ibar,-'as- 'describe'ch'and then the. tongue of the "hook at theother-end of the detector isrdefle'cted sufficiently to "permit-entranceof the other bar intothe" slot forining'the hook, t-h'e fleXi bility'andresiliency- 0f the material, of the; detector permitting such deflectionwithout i iry- I v Sofariasthe'position'of the entra-n'ce'tothehookforming slot (1 is concerned, it'is not-re-J striated-tothe*position shown provided-that "sai'd entrance extends from thelongitudinal edge of' the 'detectorto the slot.

fonnse with twosnpportingbars 0' cthe'oppesitely"and-inwardlyturnedhooks h bein g formed by elongatedslotsh, having their en tran'ee's Wat the inner ends of theslots, whichdiverge from the hooksfh so that the entran'ces in the longitudinaliedgeof thedeteetor' converge to the width of theslots, while in the formofdetectorshown in. Figs. 1 and 2 the entrances d diverge fromtheir-mouths to the slots. T-wo bars are thusn'ecessary with thedetector shown 'in Fig. 3, the upper bar elevating and the lower bardepressing the detector, said bars when operating en gaging the outerends of the slots.

The detector h is applied to or removed Having fully described myinvention, what Ijclaim, and desire to secure by Letters Patent, i s*from'thebars in a'm'an'ner similar to that described for the detector dw 1. As a new article of manufacture, a warp stop-motion detector madefrom fiat, metal tape 'havin g a-warp-eye and provided with an open hookthe entrance to which is at the side and'narrower than the length of theslot forming the hook, saidslotextending beyond the entrance thereofatbothen'cls.

2. "A loom harness-frame having'a -trans'- r 3. -A-loom harness-framehaving two trans- "verse, parallel bars, and a series of flatdetector-heddles mountedth'ereon, each heddle having at or neareach-enda longitudinal slot provided with a side entrance leading from the edgeof the heddle, the'distancebetween fiat metal having a warp-receivingopening and provided at or near each end with-an v 7 f *elon'gated'sloteach having a side entrance -"1 he' detector 7v'sl1'ownin Fign3 isintended narrower than the length of the slot, each slot extendingbeyond -its entran'ce at both ends" thereof. p

In testimony whereof I have signed my name to this specification in thepresence-of two subscribing-witnesses.

- GEORGE OJDRAPER. Witnesses:

E. D. BANoRoFT, =ALBERT "H. COUSI'NS.

